// Copyright 2019-present Facebook Inc. All rights reserved.
// This source code is licensed under the Apache 2.0 license found
// in the LICENSE file in the root directory of this source tree.

// Code generated by ent, DO NOT EDIT.

package ent

import (
	"context"

	"entgo.io/ent"
	"entgo.io/ent/dialect/sql"
	"entgo.io/ent/dialect/sql/sqlgraph"
	"entgo.io/ent/entc/integration/ent/document"
	"entgo.io/ent/entc/integration/ent/predicate"
	"entgo.io/ent/schema/field"
)

// DocumentDelete is the builder for deleting a Document entity.
type DocumentDelete struct {
	config
	hooks    []Hook
	mutation *DocumentMutation
}

// Where appends a list predicates to the DocumentDelete builder.
func (_d *DocumentDelete) Where(ps ...predicate.Document) *DocumentDelete {
	_d.mutation.Where(ps...)
	return _d
}

// Exec executes the deletion query and returns how many vertices were deleted.
func (_d *DocumentDelete) Exec(ctx context.Context) (int, error) {
	return withHooks(ctx, _d.sqlExec, _d.mutation, _d.hooks)
}

// ExecX is like Exec, but panics if an error occurs.
func (_d *DocumentDelete) ExecX(ctx context.Context) int {
	n, err := _d.Exec(ctx)
	if err != nil {
		panic(err)
	}
	return n
}

func (_d *DocumentDelete) sqlExec(ctx context.Context) (int, error) {
	_spec := sqlgraph.NewDeleteSpec(document.Table, sqlgraph.NewFieldSpec(document.FieldID, field.TypeInt))
	if ps := _d.mutation.Predicates(); len(ps) > 0 {
		_spec.Predicate = func(selector *sql.Selector) {
			for i := range ps {
				ps[i](selector)
			}
		}
	}
	// Collect blob keys before deleting rows so we can remove blobs from storage afterward.
	_blobKeys, _blobErr := ent.NewBlobs(_d.mutation.blobOpeners.Document).Delete(ctx, &sqlgraph.BlobSpec{
		Driver:    _d.driver,
		Predicate: _spec.Predicate,
		Table:     document.Table,
		Columns: map[string]string{
			document.FieldContent:     "content_key",
			document.FieldThumbnail:   "thumbnail_key",
			document.FieldAttachment:  "attachment_key",
			document.FieldMetadata:    "metadata_key",
			document.FieldPayload:     "payload_key",
			document.FieldDescription: "description_key",
			document.FieldArchive:     "archive_key",
		},
		CheckRefs: map[string]bool{
			document.FieldContent:    true,
			document.FieldThumbnail:  true,
			document.FieldAttachment: true,
		},
	})
	if _blobErr != nil {
		return 0, _blobErr
	}
	affected, err := sqlgraph.DeleteNodes(ctx, _d.driver, _spec)
	if err != nil && sqlgraph.IsConstraintError(err) {
		err = &ConstraintError{msg: err.Error(), wrap: err}
	}
	if err == nil {
		// Resolve which blobs are unreferenced now that the rows are gone, while the
		// transaction is still open, and remove them from storage once it commits.
		_blobCleanup, _blobErr := _blobKeys.Cleanup(ctx)
		if _blobErr != nil {
			return 0, _blobErr
		}
		if txd, ok := _d.driver.(*txDriver); ok {
			txd.mu.Lock()
			txd.onCommit = append(txd.onCommit, func(next Committer) Committer {
				return CommitFunc(func(ctx context.Context, tx *Tx) error {
					if err := next.Commit(ctx, tx); err != nil {
						return err
					}
					return _blobCleanup(ctx)
				})
			})
			txd.mu.Unlock()
		} else {
			err = _blobCleanup(ctx)
		}
	}
	_d.mutation.done = true
	return affected, err
}

// DocumentDeleteOne is the builder for deleting a single Document entity.
type DocumentDeleteOne struct {
	_d *DocumentDelete
}

// Where appends a list predicates to the DocumentDelete builder.
func (_d *DocumentDeleteOne) Where(ps ...predicate.Document) *DocumentDeleteOne {
	_d._d.mutation.Where(ps...)
	return _d
}

// Exec executes the deletion query.
func (_d *DocumentDeleteOne) Exec(ctx context.Context) error {
	n, err := _d._d.Exec(ctx)
	switch {
	case err != nil:
		return err
	case n == 0:
		return &NotFoundError{document.Label}
	default:
		return nil
	}
}

// ExecX is like Exec, but panics if an error occurs.
func (_d *DocumentDeleteOne) ExecX(ctx context.Context) {
	if err := _d.Exec(ctx); err != nil {
		panic(err)
	}
}